XMK 6600-166 Temperature Sensor for Sundance Spas & Jacuzzi Hot Tubs — Curled Finger Connectors & 6540-228 O-Ring

Overview

The XMK 6600-166 Temperature Sensor is a thoughtful replacement part designed for a broad range of Sundance Spas and Jacuzzi hot tubs. It features curled finger connectors for a secure, reliable connection and comes with a 6540-228 O-ring to help maintain a solid seal. With 12-foot sensor wiring, it offers flexible routing from the filter area to the control panel, making installation approachable for handy DIY spa owners.

Replacing a temperature sensor can be a practical step when your spa shows unusual temperature readings or displays watchdog-like or placeholder “- - - -” errors. While not a guaranteed fix for every issue, a properly functioning sensor can help restore a steadier temperature readout and reduce multiple error symptoms that interrupt spa use.

Key Benefits

• Broad compatibility with Sundance Spas and Jacuzzi models across several years and series
• Durable curled finger connectors for dependable electrical contact
• Includes 6540-228 rubber O-ring for a secure seal and leak prevention
• 12-foot wiring provides flexible placement without stressing the harness
• Clear, straightforward installation steps suitable for DIY replacement

Compatibility Snapshot

This sensor is designed to fit a wide array of Sundance Spas and Jacuzzi tubs, including many late-2000s and early-2010s models and LX-series systems. Because spa control boards and wire harness configurations vary, please compare the sensor’s connectors, wire length, and gasket to your current setup to confirm fitment before installation.

Installation Notes

• Locate the sensor in the filter compartment area; disconnect and remove the old unit following the tub’s service guide.
• Feed the new sensor’s wire through the tub to the equipment compartment, then connect to the PC board using the curled finger plug.
• Replace the gasket, route the wire back through, and reassemble per your spa’s instructions. No additional replacement parts are required beyond what’s listed.

Package Contents

• 1 x 6600-166 Spa Temperature Sensor with Curled Finger Connectors
• 1 x 6540-228 Rubber Gasket

Note: Ensure the spa is powered down and the water is safely drained as needed before service. This replacement part aims to restore accurate temperature reading and stable operation in compatible models.